Spool.



FI. H. BOWEN.

SPOOL.

APPLICATION FILED Nov. I3. I9I4.

Patented Aug. 31, M5..

QIHHOMIQW rant relation.

RUSSELL H. BOWEN, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGrNOR T() THEAMERICAN PULLEY COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A COB,-

PORATION OF PENNSYLVANIA.

SPOOL.

Specification of Letters Patent.

Application fx1-ed November 13, 191e. Serial No. 871,877.

T 0 all whom it may concern: Y

Be it known that I, RUSSELL I-I. BOWEN, of Philadelphia, in the countyof Philadelphia and State of Pennsylvania, .have in- Vented certain newand useful Improvements in Spools, whereof the following is aspecification, reference being had to the accompanying drawings.l

My invention relates to a spool compris ing three essential elements,viz: a barrel with an axial hole, heads on the ends of the barrel, andinternal bushings at the ends of the axial hole.

In the drawings, Figure I, represents a view, partly in side elevationand partly in axial longitudinal section, through a completed spoolembodying my invention. FFig II, is an end view thereof. Fig. III, is adetail view, partly in perspective and partly in axial section, of thebarrel portion of the spool, showing its condition before assernblage ofthe parts. Fig. IV, is a View in perspective of one of the heads, andFig. V, is a view in perspective of one of the bushl:l`he structuralcharacteristics of the three elements before assemblage will 1first bedescribed, and their relations in the combined organization will thenbeset forth.

Referring to Fig. lIII,'the barrel 1, is made of Awood or similarcompressible material. In external form it is cylindrical, as shown,having reduced end portions 12, 4 forming abrupt shoulders 13. An axialhole 14, extends through the barrel,'said hole having at its endregions, `enlarged portions 15, corresponding substantially in axialextent with the reduced portions 12. `Radial slots 16, are formed in thereduced end portions of the barrel, preferably located at quadrants, asshown. The heads 2, (see Fig. IV) are disks of iiberf or similar rigidnon-metallic material, having central holes 21, andare preferably alsoprovided with short radial slots 22, arranged in quad The thickness ofthe head is substantially less than theaxial extent of the reducedextremity of the barrel, being preferably equal to about one-half thelength u, of said reduced portion. The bushings 3 (See Fig. V) aretubular, and are formed of metal, the internal periphery beingcylindrical, but the external periphery. being in the form of twoco-axial cone frusta, as

shown at 31, 32, so as to present an-abrupt annular shoulder, with asharp edge, as indicated at 33. The profile of the longitudinal sectionmay, therefore, be considered as ratchet shaped on the exterior.

As a typical instance of the relative di mensions of the parts, I-wouldstate that if it be assumed that the reduced ends 12, of the barrel havean external diameter of one and three-sixteenths inches (1,3@ the hole.21, in the liber head should be'about one andone-eighth inches (1418-)in diameter. Assuming that the hole 15, at the end of the barrel waseleven-sixteenths (g5) of an inch in diameter, the largest diameter ofthe bushing would be about three-quarters of lan inch. The parts thusmade are as' sembled in the relation shown in Fig. I, by forcing thefiber heads 2, over the reduced portions 12, of the barrel, until saidheads are seated firmly against the shoulder 13. Thematerial of thereduced end portion 12, is compressed during the passage of the head andthereafter expands at the protruding region, leaving the region directlyinclosed by the. head still in compressive relation. The bushings 3, arethen forced into the end openings 15, until '571e outer extremities ofthe bushings are substantially flush with the ends of the barrel, thusexpanding the openings 15, and tending to enlarge the diameter of theprotruding portions of the barrel, while increasing thecompression atthe region directly inclosed by the head. The slots 16, in the barrelends facilitate both the forcing on of theheads and the forcing in ofthe bushings, and minimize the risk of splitting the wood of the barrel.The ratchet shaped profile of the bushings permits them to embedthemselves in the wood so firmly as to prevent displacement. The slots22 in the heads permit the wood to engage by expansion therein, and thusprevent the heads from turning.

I/Vhen assembled in the manner the parts will present an organizationsubstantially such as is shown in the sectioned portion of Fig. I, Whereit will be seen that the wood of the barrel, immediately inclosed by theperiphery of the hole in the fiber head, is under permanent compression,as indicated by theheavy section lines at the right hand end of Fig. I.The protruding end portions of the barrel are relatively described, i

expanded and the heads are firmly held in position against the shoulders13. The degree of expansion, as well as the eiect upon the end portion,due to the forcing on of the heads, is slightly exaggerated in Fig. I,in

order to more clearly show the general na' hole of less initial diameterthan the initial diameter of the reduced end portions of the barrel,thethickness of said head being substantially less than the length of thereduced portion of the barrel, said head being ar- 'ranged in contactwith said shoulder, and in compressive relation to the directly inclosedreduced end portion of the barrel,

. whereby a protrusion of the barrel to a substantial distance beyondthe outer face of the head is afforded and an internal bushing having aratchet shaped exterior profile, whose maximum diameter is in excess ofthe initial diameter of the end of the opening; said bushing beingarranged in expansive relation to said end portion, both in the inclosedand protruding regions thereof.

2. ln a spool, the combinationv of a barrel of compressible material,such as wood, having externally reduced end portions terminating inabrupt shoulders, provided -With a longitudinal slot, and having anaxial hole; a .head of rigid non-metallic material, such as ber, havinga central hole of less initial diameter than the initial diameter of thereduced'end portions of the barrel, the

thickness of saidY head being substantially less than the length of thereduced portion of. the barrel', said head being arranged in contactwith said shoulder, and in compressive relation to the directly inclosedreduced end portion of the barrel, whereby a protrusion of the barrel toa substantial distance 3. In a spool, the combination of a barrel ofcompressible material, such as wood, having externally reduced endportions terminating in abrupt shouldersprovided with a longitudinalslot, and having an axial hole; a head of rigid non-metallic material,such as liber, having a central hole of less initial diameter than theinitial diameter of the reduced end portions of the barrel, and

a radial slot communicating with said hole, the thickness of said headbeing substantially less than the length of the reduced portion of thebarrel, said head being arranged in contact with said shoulder, and incompressive relation to the directly 1nclosed reduced. end portion ofthe barrel, whereby a protrusion of the barrel to a substantial distancebeyond the outer face of the head is afforded, and an internal bushinghaving a ratchet shaped exterior profile, Whose maximum diameter is inexcess of the initial diameter of the end of the opening, said bushingbeing arranged in expansive relation to said end portion, both in theinclosed and protruding regions thereof.

In testimony whereof, I have hereunto signed my name at Philadelphia,Pennsylvania, this eleventhday of November, 1914.

RUSSELL H. BOWEN. Witnesses:

XVM. R. SIMPSON, HoRA'rIo N. W. DUNsErrH.

